<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        .tab ul {
            overflow: hidden;
            padding: 0;
            margin: 0;
        }

        .tab ul li {
            box-sizing: border-box;
            padding: 0;
            float: left;
            width: 100px;
            height: 45px;
            line-height: 45px;
            list-style: none;
            text-align: center;
            border-top: 1px solid blue;
            border-right: 1px solid blue;
            cursor: pointer;
        }

        .tab ul li:first-child {
            border-left: 1px solid blue;
        }

        .tab ul li.active {
            background-color: orange;
        }

        .tab div {
            width: 500px;
            height: 300px;
            display: none;
            text-align: center;
            font-size: 30px;
            line-height: 300px;
            border: 1px solid blue;
            border-top: 0px;
        }

        .tab div.current {
            display: block;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="tab">
            <ul>
                <!-- <li class="active">apple</li>
                <li>orange</li> -->
                <li @click="toggle(index)" :class="currentIndex==index?'active':''" v-for="(item,index) in list"
                    :key="item.id">{{item.title}}
                </li>
            </ul>
            <!-- <div class="current">
                <img src="img/apple.png">
            </div>
            <div>
                <img src="img/orange.png">
            </div> -->
            <div :class="currentIndex==index?'current':''" v-for="(item,index) in list" :key="item.id">
                <img :src="item.path">
            </div>
        </div>
    </div>
    <script type="text/javascript" src="../js/vue.js"></script>
    <script type="text/javascript">

        var vm = new Vue({
            el: '#app',
            data: {
                currentIndex: 0,  // 选项卡当前的索引
                list: [{
                    id: 1,
                    title: 'apple',
                    path: 'img/apple.png'
                },
                {
                    id: 2,
                    title: 'orange',
                    path: 'img/orange.png'
                },
                {
                    id: 3,
                    title: 'lemon',
                    path: 'img/lemon.png'
                }]
            },
            methods: {
                // 
                toggle(i) {
                    this.currentIndex = i
                }
            }
        });
    </script>
</body>

</html>